Strippit Houdaille HECC80/1 Control
Circuit Board Types & Usage
Note #1.    Strippit Houdaille Circuit Boards have 2 Numbers on them.   The "Odd" Number is for a  Raw-Blank Circuit Board with No Parts on it,  and is of No Interest to You or Us.    The  "Even"  Number is for a  Finished Assembly Circuit Board.
Example,  the  "Odd"  Number  #400635-xxx  is for a Blank CPU Circuit Board.   We are Interested Only in the  "Even"  #400636-xxx  Finished Assembly CPU Board Number.

Note #2.    Many Early Circuit Boards were Poorly-Marked or Not-Marked Correctly at All.
Also,  Many Board-Types were Modified & Changed & Swapped in the Field,  and the New Dash-Number  (-xxx) Type was Often Not Updated,  Leading to Much Confusion.

Note #3.    Strippit Made Many Different Versions of some of these Boards that are Very Similar,  But are Not The Same!   Pay Attention to the  ( -xxx )  Dash Numbers at the End!

Note #4.    HECC80/1 & HECC80/3 Type Circuit Boards Are Very Similar,  But Are Not the Same!    If You have More than 1 HECC80 Control Machine,  Do Not Mix up the Boards!
CPU Board

#400636-100   Standard CPU  Set-Up for
                       20-ma Current-Loop Interface
#400636-232   Standard CPU  with RS-232 Interface

Comes in above 2 Types.  The Only Difference is the -100 Type can Interface to Defunct Teletype ASR33 Printer/Punches (which I have seen used once in 29 years!)  and the -232 Type can Communicate to P.C. Computers through it's RS232 Port.
The -100 Type can be Converted to the -232 Type.

CPU Boards are Only Used in Cardcage Slot #2.
The CPU is the "Brain" of the Control,
if it's Not Working,  Nothing Will Work!
In Normal Operation,  the CPU Board has
2 Green-LED Lights  "On" & 3 Red-LED Lights  "Off".
Prom #1  &  Prom #2 Boards
These Sets of 2 Prom Boards Store the Executive-Run Program that Runs the Control & Machine.   Prom 1 Boards goes in Slot #3 & Prom #2 Board in Slot #4.  Here are a Few of the Many Versions of these Boards;

#400478-300   HECC80/1 Prom #1
#400478-400   HECC80/1 Prom #2
#400478-422   HECC80/1 Prom #2 LaserTool Option

#400478-320   HECC80/102 Prom #1
#400478-420   HECC80/102 Prom #2
#400478-424   HECC80/102 Prom #2 LaserTool Option

#400478-350   HECC80/28 Prom #1 LaserTool
#400478-450   HECC80/28 Prom #2 Lasertool

#400478-370   HECC80/28 Prom #1 Turbo-Lasertool
#400478-470   HECC80/28 Prom #2 Turbo-Lasertool

#400478-700   HECC80/750 Prom #1
#400478-800   HECC80/750 Prom #2

#400478-720   HECC80/752 Prom #1
#400478-820   HECC80/752 Prom #2

Special Information,  like Machine Type & Size,
Options,  Etc.,  was Programmed into Chip #15.

Prom Board Failures usually cause  "Check Sum Error" at Control Power-On,  and Red-LED Lights after Control is Running.    We Can Repair Prom Boards,
and We Can Add Options Like RS-232 Downloading.
Ram #1  &  Ram #2  Memory Boards

Your Part Programs are Stored in these Ram Memory 2-Board Sets.
Ram #1 goes in Slot #5,   and Ram #2 in Slot #6.

#400480-000   Standard 16K-Memory Ram #1
#400480-400   Standard 8K-Memory Ram #2
#400480-008   Special 12K-Memory Ram #1 for HECC80/28 Lasertool Controls Only
This is a Listing of the
Types & Usage
of the Electronic Circuit Boards
in Strippit Houdaille HECC80/1 Type CNC Controls.

These CNC Controls were Used on Strippit CNC Turret Punch Press and Laser Machines
Built in the 1970's & 1980's.

The HECC80/1 Type Controls
Looked like Picture to the Right.

If Your Control
Does Not look like This Control,  Then go to Our
"HECC80 Control Types
Web-Page and
Properly Identify
Your CNC Control Type!
Front Panel Controller Board

#400476-000  Front Panel Controller,  Slot #7

This is the Board that  "Talks"  to All the other Parts on the Control Front Panel (the Door).
Like the Self-Scan Display,  Tapereader,
and All the Control Panel Switches & Knobs.

If You are using a  M81 Post Punch Delay Programming Code,  the Control Looks at the Switch Position on this Board to Determine if you want a  100 MSec. Delay  (Switch Down)
or a  250 MSec. Delay  (Switch Up).

When Replacing this Board,
Try to Insert the 2 Ribbon Cables Correctly
( Brown Wire is Always  "UP" )
Try to Put Cables in the Correct Slot!
Lamp & Control Driver Board

This Board Originates the Commands for all the Solenoid Drives for the Machine, and all the Control Front Panel Lights.   Board goes in Slot #8.
There are 3  Non-Interchangeable Board Types;

#400464-000   The Original Early-HECC80 Type, used Only with the Small  #400504-000 Solenoid Driver Board Located in the  Top of Servo Cabinet.

#400464-200   Improved HECC80/1 Type.  Connects through a Ribbon Cable to #400790-100 Output Isolator (Solenoid Driver) Board Located in the Back-Side of the Control Cabinet.  This Board also has Improved Anti-Punch Circuitry so that it Won't Punch when the CPU Board Loses it's  "Mind".

#400464-300  Used in FC750 and FC750/2 Machines,
also Drives a #400504-000 Solenoid Driver Board.
Machine Switch Isolator Board

#400472-000  Machine Switch Isolator Board, 
1 Type for All HECC80/1 Type Controls,  Slot #9.

All the Switch-Signals on the Standard Machine Return to the CNC Control through this Board.

One Chronic Problem with this Board is that after Many Years & Thousands of Hours of Use, the Opto Isolator Chips used on this Board Actually Grow-Weaker and Wear-Out
This can Cause False Switch Signals,  and the Board will Need to Rebuilt with New I.C. Chips.
We,  of Course,  Can Do this Testing & Repair.
Axis Control Board

#400470-000  Axis Control Board 
only 1 Type made for All HECC80/1 Types.

3 Boards per Control are Used;
1  in  Slot  #12  for  X-Axis
1  in  Slot  #13  for  Y-Axis
1  in  Slot  #14  for  T-Axis

These Boards Hold and Execute each
Axis Move as the CNC Control issues each Program Move to it.
Position Comparator Board

3 Types were Made;
#400474-000   First Type Board,  used with  2-MHZ Square-Wave Resolver Excitation Board Systems.

#400474-200   Second Type,  Removing Capacitor C1 makes it a  -200 Board used with  3-MHZ Square or Sine Wave Resolver Excitation Board Systems.

#400474-300   Third & Last Type.  No C1 Capacitor.
Resistor R4 changed to 75K to allow more Punch Anticipation for a Faster Punch Rate.   Mainly used with 3MHZ Sine-Wave Excitation Board Systems.

3 Boards used per System,  X in Slot  #15,
Y in Slot  #16,  and  T in Slot  #17.   These Boards Compare the Command Position from the Axis Board & Actual Resolver Feedback Position,  and Generate a Error Signal to Phase Analog Board.
Resolver Excitation Boards

These Boards make the Sine and Cosine Excitation Signals for the Resolvers Located in the Feedback Packages on the End of the Axis Servo Motors.

Boards go in Slot #19.
3 Types of these Boards were Made;

#400468-000   2 MHZ Square-Wave Type.   Used on Early HECC80/1 Controls.   No Crystal on Board.

#400468-300   3 MHZ Square-Wave Type.
Has On-Board Crystal to Provide the  3-MHZ Signal. Frequency was Increased to Improve the Servo Response and Better Servo  "Tuning".

#401272-100   3MHZ Sine-Wave Type.   Output Waveform is a Sine-Wave instead of the Square-Wave of Older Type Boards.  This Board Greatly Increased the Positioning Accuracy that the Laser Machines Showed was Lacking in Older Square-Wave Types.

Note,   These 3 Boards are  Not Interchangeable!   However,  Machines with Older Type Boards can be Changed to the Newer Type Board to Improve Accuracy,  but This Does Require some
Rewiring of Control Cardcage.

Late HECC80 Controls came from the Factory with the 3-MHZ Sine-Wave Boards,  and some Controls were Retrofitted In-The-Field to this Type to Improve Accuracy.   Be Sure what you Have.
Phase Analog Boards
Many Different Types, Sometime Machines have the "Wrong"  Type Board in Control,  but still will Run OK.

#400482-000   Early FC1250/30/1500 Machines using
2 MHZ Square-Wave Resolver Excitation Boards.

#400482-100   Early FC1000/2 and FC750 Machines using 2MHZ Square-Wave Resolver Excitation Boards.

#400482-200   Early FC1250/45 Machines using 2 MHZ Square-Wave Resolver Excitation Boards.

#400482-300   FC1000/2 Machines using 3 MHZ Square & Sine Wave Resolver Excitation Boards.

#400482-301  FC1250/30/1500 and FC1250/45 Machines using 3 MHZ Resolver Excitation Boards.

#400482-30A   Some kind of 3MHZ Rebuilt Board ???

#400482-600   FC750/2 Machines & FC750 Machines with the  "Nibble-Drift Retrofit"  to Improve Contour Nibbling.   Both use the 3MHZ Sine-Wave Resolver Excitations Board.

Phase Analog Boards  (Slot #18)  take the Digital Position Error Signal from the Position Comparator Board and Converts it to a Analog Signal for the Servo Drives.   The Potentiometers allow each Axis to be  "Tuned" for the Variations of each Individual Machine.
Continuous Contour Board

#400888-000  Continuous Contour Circuit Board.

Board goes in Slot #10,  and allows the Smooth Continuous Motion in the X and Y Axis that is Required by a Laser Cutting Machine.

General Purpose I/O Board

#400790-100   General Purpose Input Output Board

Used on Machines with Load / Unload Systems
and Lasers Machines to Handle the Extra I/O Switch and Driver Requirements.

Connects by Ribbon Cables to the #400788-xxx
Input & Output Isolators Boards.

Goes in Slot #21.

Input & Output Isolator Boards

#400788-000   13-Output (Solenoid Driver) Isolator
Board used with the #400464-200 Type Lamp & Control Driver Circuit Board.

#400788-100   24-Output (Solenoid Driver) Isolator Board  used with the #400790-100 General Purpose I/O Boards.    A #400788-100 24-Output Board May also be Substituted for the #400788-000 13-Output Board.

#400788-200   24-Input Isolator Board.  Provides 24 Opto-Isolated Inputs to Control for Load / Unload and Laser Machine Switches.

Solenoid Driver Boards

There are 2 Versions of this Board.

#400504-000   Solenoid Driver Board. 
Used on the Original HECC80  (NOT HECC80/1) Controls that used the #400464-000  (Not #400464-200) Lamp & Control Driver Circuit Board. 
This Type Driver Board was also used on
All  FC750,  FC750/2,  and  FC75/30 Machines.

#400504-200   Solenoid Driver Board.
Used on the  NC "A" Control Machines
and the  T-SAF 30 Machines.

Master Monitor Boards

These Boards have 2 Functions;
1 -- This Board is Always On, It Starts-Up Control & Machine when You Push System-On Button.
2 -- It Monitors (With the Slave Monitor Board) All of the Controls & Machines D.C. Voltages.

If 1 of the Voltages is Too High or Low,  it  will Shut-Off the Control about a Second after Turn-On.  This is The Most Common Control Problem, and is Caused by Either A Short-Circuit in the Control or Machine, or a Bad Power Supply Board.
By Testing the 16 Test-Points on Both Master & Slave Boards, you can See which Power Supply they Did Not Like and Caused the Shut-Down.

Goes in Slot S2,  There are 2 Versions of Board;

#400536-000   Standard Monitor Board.

#400536-500   Standard Monitor Board, Except that Jumper #5 Has been Removed so that it does Not Monitor for the +250VDC Supply when New-Style Display Retrofit has been Installed which Requires that the +250 VDC Supply be Disabled.
Slave Monitor Boards

It Monitors All of the Controls D.C. Voltages
(with the Master Monitor Board).  Goes in Slot S1.
If 1 of the Voltages is Too High or Low,  it  will
Shut-Off the Control about a Second after
Control Turn-On. 

There are Many Versions of this Board.

#400536-102   Early FC750
#400536-103   Standard FC1000's & FC1250's
#400536-104   Late FC750 & FC750/2
#400536-106   Laser Center
Power Supply #1 Board

#400538-000   Power Supply #1 Board

This takes the Raw D.C. Voltages from
the Floor-Plate, and Regulates them to
the Following 6 Voltages;
Plus & Minus  5  Volts D.C.
Plus & Minus  12 Volts D.C.
Plus & Minus  15 Volts D.C.

Board goes in Slot#  S4.

Power Supplies Run-Hot!
I Mount a 4-Inch Muffin Fan Under Power Supply #1 & #2 Boards Blowing Upward on to Their Black Heatsinks for Good Cooling.

Both Power Supply #1 and #2 Boards are Fairly High-Failure Items.   When Having Controls Shut-Off Problems,  we usually have Customers Send-In these 2 Boards for Testing,  Repairs &  Up-Dating.
Power Supply #2 Board

This takes Raw D.C. Voltages from Floor-Plate and Regulates them to following 4 Voltages;

Control 24 Volts D.C.
Machine 24 Volts D.C.   ( VDC-Voltage )
Machine 12 Volts D.C.   ( 1DC-Voltage )
Display 250 Volts D.C.

Board goes in Slot# S3.
There are 2 Versions of this Board;

#400764-000  Standard Power Supply #2.

#400764-100  Standard Power Supply #2
Except that it does Not have the 250 Volt Components and does Not Make 250 Volts.  Used on Machines that have Display Retrofit that does Not Require the 250 Volt Supply. 

Note,  you can use a  -000 Type in place of a 
-100 Board,  But you can Not use a  -100 Board in Place of a -000 if you still have the Original Burroughs Display which Uses the 250 Volts.

#400799-600   Standard HECC80/1 Type Keypad
with Prom Chip.

We Keep All of These
HECC80/1 Type Circuit Boards  In-Stock  For-Sale
and also
Can Usually Test & Repair Your Circuit Boards.
This page was last updated: September 9, 2008
Transition Boards

#400880-xxx  Transition Boards were made in Many Different Versions for all the Various HECC80 Controls.

These Boards were used to  "Transition"  from Hard-Wiring between the Panel Switches,  Tapereaders,  Etc.,  to
Ribbon Cables to take the Signals to
the Control Boards in the Cardcage.

All of the HECC80/1 Type Controls had
3 of these Boards,  All were Wired Differently with Different Components.

In the Top Picture at the Right,
is shown the 2 Transition Boards
(2 are Stacked on Top of Each Other)
that are at the Top Left Corner of the HECC80 Control Door.

The Transition Board at the Lower Right is Located Close to the Tapereader in the Middle of the HECC80 Control Door.

This Board has the  "Thumb Wheel"  Rotary Switch that Customers Can't Seem to Find.   It is Used to Set the Baud Rate for RS-232 Communications.   We Set Switch to  "1"  for 300 Baud,  which is the ONLY Baud rate that Works in HECC80/1 Controls.
Extender Board

#400322-000   Extender Board

Used by Service Technicians to Extend Out of the Cardcage
a Circuit Board so that it can be
Probed & Tested
with Voltmeters and Oscilloscopes.

Every HECC80 Control Built
Shipped from the Strippit Factory with 1 of these Boards
in it's Cardcage.
Note-1    Capacitor C1 Needs to be Removed from the 3 Boards of a  3-MHZ Square  or Sine Wave Excitation System,  or Intermittent Zero & Positioning may result.
This is a Very Common Error,  and I find many Controls with Incorrect Board Versions.

Note-2    The Switch is Only used for a Certain Test Procedure that You,  The Customer,
will Never Use.   In Normal Operation,  it Does Not Matter if Switch is in Up or Down Position,  But I Normally leave All 3 Switches  "Down".
Note!   Strippit used TI  (Texas Instruments)  Chip Sockets on Early Prom Boards.  These were Cheap, but Not the Best Sockets available.   They sometimes did not  "Grip"  the Prom Chip-Legs Tightly enough,  and caused  Intermittent Bad Connections.   These Bad Connections would cause  "Check Sum"  Errors at Start Up,  and would also cause Intermittent Control Failures While Running,  with  Red LED Lights Lit-Up on the CPU Board and all the Front Panel Lights would be  "ON"  as the CPU Board was no longer Running.    TI Sockets have Small Rectangle-Holes where Chip-Legs are Inserted.

Later Boards were Manufactured with  "Machined-Pin"  Chip Sockets.   These Sockets can be Identified by the Gold-Plated Round Holes where Chip-Legs are Inserted.   These Sockets Grips Chip-Legs Better,  and prevents the above Problems.   Old Sockets are Very Difficult to Replace without Damaging the Circuit Board,  and I advise Replacing the 2 Prom Boards with New Boards with the Machined Pin Sockets Sockets!
With our New Digital Oscilloscopes,  we can Capture & See Power Problems that we always Suspected Existed,  but could Not See with the old Analog Oscilloscopes.

The Power Supply #1 & #2 Circuit Boards have some Designed-In Deficiencies that sometimes cause the Power Supplies to Break into Oscillations.   These Oscillations cause Many Intermittent Controls Problems and Control Shut-Downs.    With Any
Intermittent Controls Problems,  the First Place to Start is to Send-In these 2 Boards for
Rebuilding,  because the CNC Control Cannot Function Without Good Clean DC Power!